Ultimate Billet Oil Cap & Filter Kit

The NRW-Design Ultimate BMW Billet Oil Cap is a direct-fit upgrade for BMW owners who demand both performance and refinement under the hood. CNC-machined from a solid block of 6061-T6 aluminum, this oil filler cap replaces the factory plastic unit with a precision-built, motorsport-inspired alternative that’s engineered to last.

Finished in a hard anodized black with laser-etched branding, this cap adds a clean, purposeful aesthetic to your engine bay while retaining full OEM functionality. Designed for a wide range of BMW engines—from classic inline-6s to modern turbocharged powerplants—this cap uses the factory-style internal seal and locking mechanism for a perfect, leak-free fit.

Features:

• CNC-machined from 6061-T6 billet aluminum: Includes billet 2-peice filler cap, billet threaded funnel adapter, funnel, funnel screen, and threaded funnel tube
• Fits most BMW engines including S65, S85, N54, N55, B58, S58, S63, N20, and more
• Direct replacement for OEM plastic oil filler cap
• Uses factory-style locking tabs and gasket for proper sealing
• Durable hard anodized black finish with laser-etched NRW branding
• Compatible with OEM and NRW Viton oil cap gaskets